Efficient Ultra-High Speed Communication with Simultaneous Phase and Amplitude Regenerative Sampling (SPARS)

Journal article


Publication Details

Author(s): Carlowitz C, Girg T, Ghaleb H, Du XQ
Journal: Frequenz
Publication year: 2017
Volume: 71
Journal issue: 9-10
Pages range: 449
ISSN: 0016-1136
Language: English


Abstract


For ultra-high speed communication systems at high center frequencies above 100 GHz, we propose a disruptive change in system architecture to address major issues regarding amplifier chains with a large number of amplifier stages. They cause a high noise figure and high power consumption when operating close to the frequency limits of the underlying semiconductor technologies. Instead of scaling a classic homodyne transceiver system, we employ repeated amplification in single-stage amplifiers through positive feedback as well as synthesizer-free self-mixing demodulation at the receiver to simplify the system architecture notably. Since the amplitude and phase information for the emerging oscillation is defined by the input signal and the oscillator is only turned on for a very short time, it can be left unstabilized and thus come without a PLL. As soon as gain is no longer the most prominent issue, relaxed requirements for all the other major components allow reconsidering their implementation concepts to achieve further improvements compared to classic systems. This paper provides the first comprehensive overview of all major design aspects that need to be addressed upon realizing a SPARS-based transceiver. At system level, we show how to achieve high data rates and a noise performance comparable to classic systems, backed by scaled demonstrator experiments. Regarding the transmitter, design considerations for efficient quadrature modulation are discussed. For the frontend components that replace PA and LNA amplifier chains, implementation techniques for regenerative sampling circuits based on super-regenerative oscillators are presented. Finally, an analog-to-digital converter with outstanding performance and complete interfaces both to the analog baseband as well as to the digital side completes the set of building blocks for efficient ultra-high speed communication.


FAU Authors / FAU Editors

Carlowitz, Christian Dr.-Ing.
Lehrstuhl für Hochfrequenztechnik
Girg, Thomas
Lehrstuhl für Technische Elektronik


External institutions with authors

Technische Universität Dresden
Universität Stuttgart


How to cite

APA:
Carlowitz, C., Girg, T., Ghaleb, H., & Du, X.-Q. (2017). Efficient Ultra-High Speed Communication with Simultaneous Phase and Amplitude Regenerative Sampling (SPARS). Frequenz, 71(9-10), 449. https://dx.doi.org/10.1515/freq-2017-0163

MLA:
Carlowitz, Christian, et al. "Efficient Ultra-High Speed Communication with Simultaneous Phase and Amplitude Regenerative Sampling (SPARS)." Frequenz 71.9-10 (2017): 449.

BibTeX: 

Last updated on 2019-30-01 at 16:14

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